--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.target/powerpc/pragma_power8.c	Mon May 25 07:50:57 2020 +0900
@@ -0,0 +1,52 @@
+/* { dg-do compile } */
+/* { dg-require-effective-target lp64 } */
+/* { dg-require-effective-target powerpc_p8vector_ok } */
+/* { dg-options "-mdejagnu-cpu=power6 -maltivec -O2" } */
+
+#include <altivec.h>
+
+#pragma GCC target ("cpu=power6,altivec")
+#ifdef _ARCH_PWR6
+vector int
+test1 (vector int a, vector int b)
+{
+  return vec_add (a, b);
+}
+#else
+#error failed power6 pragma target
+#endif
+
+#pragma GCC target ("cpu=power7")
+/* Force a re-read of altivec.h with new cpu target. */
+#undef _ALTIVEC_H
+#include <altivec.h>
+#ifdef _ARCH_PWR7
+vector signed int
+test2 (vector signed int a, vector signed int b)
+{
+  return vec_sldw (a, b, 3);
+}
+#else
+#error failed to set power7 pragma target
+#endif
+
+#pragma GCC target ("cpu=power8")
+/* Force a re-read of altivec.h with new cpu target. */
+#undef _ALTIVEC_H
+#include <altivec.h>
+#ifdef _ARCH_PWR8
+vector int
+test3 (vector int a, vector int b)
+{
+  return vec_mergee (a, b);
+}
+typedef __attribute__((altivec(vector__))) long vec_t;
+int
+test3b (vec_t a, vec_t b)
+{
+  return __builtin_vec_vcmpeq_p (2, a, b);
+}
+#else
+#error failed to set power8 pragma target.
+#endif
+